Q: Valid English sentence (grammatically) or not: John coughed himself awake on the bank of the lake where he and Bill had their play.

A: acceptable

Q: Valid English sentence (grammatically) or not: The raise which Scrooge generously gave Tom's father increased his yearly salary by five cents.

A: acceptable

Q: Valid English sentence (grammatically) or not: Suddenly, there appeared two ships on the horizon.

A:
acceptable